PHF8-promoted TOPBP1 demethylation drives ATR activation and preserves genome stability.
PHF8-promoted TOPBP1 demethylation drives ATR activation and preserves genome stability.
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DOI:
10.1126/sciadv.abf7684
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发表时间:
2021-05
期刊:
影响因子:
13.6
通讯作者:
Shi L
中科院分区:
文献类型:
--
作者:
Ma S;Cao C;Che S;Wang Y;Su D;Liu S;Gong W;Liu L;Sun J;Zhao J;Wang Q;Song N;Ge T;Guo Q;Tian S;Chen CD;Zhang T;Wang J;Ding X;Yang F;Ying G;Yang J;Zhang K;Zhu Y;Yao Z;Yang N;Shi L
PHF8-promoted non-histone methylation switch plays a critical role in replication stress response and genome integrity. The checkpoint kinase ATR [ATM (ataxia-telangiectasia mutated) and rad3-related] is a master regulator of DNA damage response. Yet, how ATR activity is regulated remains to be investigated. We report here that histone demethylase PHF8 (plant homeodomain finger protein 8) plays a key role in ATR activation and replication stress response. Mechanistically, PHF8 interacts with and demethylates TOPBP1 (DNA topoisomerase 2-binding protein 1), an essential allosteric activator of ATR, under unperturbed conditions, but replication stress results in PHF8 phosphorylation and dissociation from TOPBP1. Consequently, hypomethylated TOPBP1 facilitates RAD9 (RADiation sensitive 9) binding and chromatin loading of the TOPBP1-RAD9 complex to fully activate ATR and thus safeguard the genome and protect cells against replication stress. Our study uncovers a demethylation and phosphorylation code that controls the assembly of TOPBP1-scaffolded protein complex, and provides molecular insight into non-histone methylation switch in ATR activation.
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DOI:
10.1126/science.1203430
发表时间:
2011-06-10
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Cotta-Ramusino C;McDonald ER 3rd;Hurov K;Sowa ME;Harper JW;Elledge SJ
通讯作者:
Elledge SJ
影响因子:
16
作者:
Gong, Zihua;Kim, Ja-Eun;Leung, Charles Chung Yun;Glover, J. N. Mark;Chen, Junjie
通讯作者:
Chen, Junjie
影响因子:
16
作者:
Kim J;Sturgill D;Sebastian R;Khurana S;Tran AD;Edwards GB;Kruswick A;Burkett S;Hosogane EK;Hannon WW;Weyemi U;Bonner WM;Luger K;Oberdoerffer P
通讯作者:
Oberdoerffer P
影响因子:
14.9
作者:
Feng H;Lu J;Song X;Thongkum A;Zhang F;Lou L;Reizes O;Almasan A;Gong Z
通讯作者:
Gong Z
影响因子:
10.5
作者:
Couch, Frank B.;Bansbach, Carol E.;Cortez, David
通讯作者:
Cortez, David